Security plate



FIG. 1 is a perspective view of security plate showing my new design, it being understood that the broken lines are for illustrative purposes only;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is a rear elevational view of FIG. 2;

FIG. 4 is a top plan view of FIG. 2;

FIG. 5 is a bottom plan view of FIG. 2;

FIG. 6 is a right side elevational view of FIG. 2; and

FIG. 7 is a left side elevational view of FIG. 2. 

The ornamental design for a security plate, substantially as shown and described. 